Date: Fri, 1 Sep 2017 17:35:57 +0200 From: Christian Brauner <christian.brauner@...ntu.com> To: musl@...ts.openwall.com Cc: Christian Brauner <christian.brauner@...ntu.com> Subject: [PATCH 0/1] openpty: use TIOCGPTPEER to open slave side fd Hi, Newer kernels expose the ioctl TIOCGPTPEER  call to userspace which allows to safely allocate a file descriptor for a pty slave based solely on the master file descriptor. This allows us to avoid path-based operations and makes this function a lot safer in the face of devpts mounts in different mount namespaces. : https://patchwork.kernel.org/patch/9760743/ The way I wrote this patch it doesn't use the snprintf() and open() routine as a fallback in case the ioctl() call fails. If this is a compatibility issue for non-Linux systems I can rewrite. But the musl documentation gave me the impression that this is not really a concern. If possible, please Cc me on this since I'm not subscribed to the mailing list (yet). Thanks! Christian Christian Brauner (1): openpty: use TIOCGPTPEER to open slave side fd src/misc/openpty.c | 34 +++++++++++++++++++++++++++++++--- 1 file changed, 31 insertions(+), 3 deletions(-) -- 2.14.1
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